{"id":"CVE-2026-55790","aliases":["CLSA-2026-1784077481","EUVD-2026-41209","GHSA-24x4-j6x9-rfw5","GHSA-x76w-8c62-48mg"],"status":"published","title":"Craft CMS: DOM XSS via GitHub issue title in CraftSupport widget","description":"Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22 and 4.0.0-RC1 through 4.17.15, an attacker with only a GitHub account can plant a JavaScript payload in a craftcms/cms issue title. When a Craft admin uses the CraftSupport widget’s \"Give feedback\" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session. No control panel account or elevated privileges are required on the attacker’s side. This issue has been fixed in versions 4.17.16 and 5.9.23.","severity":{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00461,"percentile":0.40275,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-07-01T22:57:53Z","modified":"2026-10-28T02:30:28Z","fixes":[{"ecosystem":"Packagist","package":"craftcms/cms","fixed_in":["5.9.22","4.17.15","5.9.23","4.17.16"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0-RC1"},{"fixed":"5.9.22"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-RC1"},{"fixed":"4.17.15"}]}]},{"source":"osv","ecosystem":"TuxCare:Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.9.15"},{"fixed":"3.9.15-p6+tuxcare"}]}],"versions":["3.9.15","3.9.15-p1+tuxcare","3.9.15-p2+tuxcare","3.9.15-p3+tuxcare","3.9.15-p4+tuxcare","3.9.15-p5+tuxcare"],"bundled":2},{"source":"osv","ecosystem":"Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0-RC1"},{"fixed":"5.9.23"}]}],"versions":["5.0.0","5.0.0-RC1","5.0.1","5.0.2","5.0.3","5.0.4","5.0.5","5.0.6","5.1.0","5.1.1","5.1.10","5.1.2","5.1.3","5.1.4","5.1.5","5.1.6","5.1.7","5.1.8","5.1.9","5.2.0","5.2.0-beta.1","5.2.0-beta.2","5.2.0-beta.3","5.2.0-beta.4","5.2.0-beta.5","5.2.0-beta.6","5.2.1","5.2.10","5.2.2","5.2.3","5.2.4","5.2.4.1","5.2.5","5.2.6","5.2.7","5.2.8","5.2.9","5.3.0","5.3.0-beta.1","5.3.0-beta.2","5.3.0.1","5.3.0.2","5.3.0.3","5.3.1","5.3.2","5.3.3","5.3.4","5.3.5","5.3.6","5.4.0","5.4.0.1","5.4.1","5.4.10","5.4.10.1","5.4.2","5.4.3","5.4.4","5.4.5","5.4.5.1","5.4.6","5.4.7","5.4.7.1","5.4.8","5.4.9","5.5.0","5.5.0.1","5.5.1","5.5.1.1","5.5.10","5.5.2","5.5.3","5.5.4","5.5.5","5.5.6","5.5.6.1","5.5.7","5.5.8","5.5.9","5.6.0","5.6.0.1","5.6.0.2","5.6.1","5.6.10","5.6.10.1","5.6.10.2","5.6.11","5.6.12","5.6.13","5.6.14","5.6.15","5.6.16","5.6.17","5.6.2","5.6.3","5.6.4","5.6.5","5.6.5.1","5.6.6","5.6.7","5.6.8","5.6.9","5.6.9.1","5.7.0","5.7.0-beta.1","5.7.0-beta.2","5.7.1","5.7.1.1","5.7.10","5.7.11","5.7.2","5.7.3","5.7.4","5.7.5","5.7.6","5.7.7","5.7.8","5.7.8.1","5.7.8.2","5.7.9","5.8.0","5.8.1","5.8.10","5.8.11","5.8.12","5.8.13","5.8.13.1","5.8.13.2","5.8.14","5.8.15","5.8.16","5.8.17","5.8.18","5.8.19","5.8.2","5.8.20","5.8.21","5.8.22","5.8.23","5.8.3","5.8.4","5.8.5","5.8.6","5.8.7","5.8.8","5.8.9","5.9.0","5.9.0-beta.1","5.9.0-beta.2","5.9.1","5.9.10","5.9.11","5.9.12","5.9.13","5.9.14","5.9.15","5.9.16","5.9.17","5.9.18","5.9.19","5.9.2","5.9.20","5.9.21","5.9.22","5.9.3","5.9.4","5.9.5","5.9.6","5.9.7","5.9.8","5.9.9"]},{"source":"osv","ecosystem":"Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-RC1"},{"fixed":"4.17.16"}]}],"versions":["4.0.0","4.0.0-RC1","4.0.0-RC2","4.0.0-RC3","4.0.0.1","4.0.1","4.0.2","4.0.3","4.0.4","4.0.5","4.0.5.1","4.0.5.2","4.0.6","4.1.0","4.1.0.1","4.1.0.2","4.1.1","4.1.2","4.1.3","4.1.4","4.1.4.1","4.10.0","4.10.0-beta.1","4.10.0-beta.2","4.10.1","4.10.2","4.10.3","4.10.4","4.10.5","4.10.6","4.10.7","4.10.8","4.11.0","4.11.0.1","4.11.0.2","4.11.1","4.11.2","4.11.3","4.11.4","4.11.5","4.12.0","4.12.1","4.12.2","4.12.3","4.12.4","4.12.4.1","4.12.5","4.12.6","4.12.6.1","4.12.7","4.12.8","4.12.9","4.13.0","4.13.1","4.13.1.1","4.13.10","4.13.2","4.13.3","4.13.4","4.13.5","4.13.6","4.13.7","4.13.8","4.13.9","4.14.0","4.14.0.1","4.14.0.2","4.14.1","4.14.10","4.14.11","4.14.11.1","4.14.12","4.14.13","4.14.14","4.14.15","4.14.2","4.14.3","4.14.4","4.14.5","4.14.6","4.14.7","4.14.8","4.14.8.1","4.14.9","4.15.0","4.15.0-beta.1","4.15.0-beta.2","4.15.0.1","4.15.0.2","4.15.1","4.15.2","4.15.3","4.15.4","4.15.5","4.15.6","4.15.6.1","4.15.6.2","4.15.7","4.16.0","4.16.1","4.16.10","4.16.11","4.16.12","4.16.13","4.16.14","4.16.15","4.16.16","4.16.17","4.16.18","4.16.19","4.16.2","4.16.3","4.16.4","4.16.5","4.16.6","4.16.6.1","4.16.7","4.16.8","4.16.9","4.16.9.1","4.17.0","4.17.0-beta.1","4.17.0-beta.2","4.17.1","4.17.10","4.17.11","4.17.12","4.17.13","4.17.13.1","4.17.14","4.17.15","4.17.2","4.17.3","4.17.4","4.17.5","4.17.6","4.17.7","4.17.8","4.17.9","4.2.0","4.2.0.1","4.2.0.2","4.2.1","4.2.1.1","4.2.2","4.2.3","4.2.4","4.2.5","4.2.5.1","4.2.5.2","4.2.6","4.2.7","4.2.8","4.3.0","4.3.1","4.3.10","4.3.11","4.3.2","4.3.2.1","4.3.3","4.3.4","4.3.5","4.3.6","4.3.6.1","4.3.7","4.3.7.1","4.3.8","4.3.8.1","4.3.8.2","4.3.9","4.4.0","4.4.0-beta.1","4.4.0-beta.2","4.4.0-beta.3","4.4.0-beta.4","4.4.0-beta.5","4.4.0-beta.6","4.4.0-beta.7","4.4.1","4.4.10","4.4.10.1","4.4.11","4.4.12","4.4.13","4.4.14","4.4.15","4.4.16","4.4.16.1","4.4.17","4.4.2","4.4.3","4.4.4","4.4.5","4.4.6","4.4.6.1","4.4.7","4.4.7.1","4.4.8","4.4.9","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CMS: DOM XSS via GitHub issue title in CraftSupport widget","description":"Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22 and 4.0.0-RC1 through 4.17.15, an attacker with only a GitHub account can plant a JavaScript payload in a craftcms/cms issue title. When a Craft admin uses the CraftSupport widget’s \"Give feedback\" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session. No control panel account or elevated privileges are required on the attacker’s side. This issue has been fixed in versions 4.17.16 and 5.9.23.","status":"published","published":"2026-07-01T22:57:53.934Z","modified":"2026-07-02T19:41:26.967Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:11.925815Z"}],"euvd":[{"id":"EUVD-2026-41209","description":"Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22 and 4.0.0-RC1 through 4.17.15, an attacker with only a GitHub account can plant a JavaScript payload in a craftcms/cms issue title. When a Craft admin uses the CraftSupport widget’s \"Give feedback\" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session. No control panel account or elevated privileges are required on the attacker’s side. This issue has been fixed in versions 4.17.16 and 5.9.23.","status":"published","published":"2026-07-01T22:57:53Z","modified":"2026-07-02T19:41:26Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T18:20:17.020342Z"}],"ghsa":[{"id":"GHSA-24x4-j6x9-rfw5","title":"Craft CMS: DOM XSS via GitHub issue title in CraftSupport widget","description":"## Summary\n\nAn attacker with only a GitHub account can plant a JavaScript payload in a `craftcms/cms` issue title. When a Craft admin uses the CraftSupport widget’s \"Give feedback\" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session.\n\nNo control panel account or elevated privileges are required on the attacker’s side.\n\n## Preconditions\n\n- Attacker has a GitHub account (no control panel access needed).\n- Victim is an administrator, and you have the CraftSupport widget on the dashboard.\n- Victim uses the \"Give feedback\" screen and types a search term that returns the poisoned issue.\n\n## Root cause\n\n`CraftSupportWidget.js` lines 382-392:\n\n```js\n$('\u003ca\u003e', {\n  href: this.getSearchResultUrl(results[i]),\n  target: '_blank',\n  html:\n    '\u003cspan class=\"status ' +\n    this.getSearchResultStatus(results[i]) +\n    '\"\u003e\u003c/span\u003e' +\n    this.getSearchResultText(results[i]),\n})\n```\n\n`FeedbackScreen.getSearchResultText` (line 669-671) returns `result.title` verbatim from the GitHub API response. The jQuery `html:` option sets the element’s `innerHTML`, so a title containing `\u003cimg src=x onerror=...\u003e` executes immediately on render.\n\nThe GitHub API returns issue titles as raw JSON strings with no HTML encoding. The widget makes this request directly from the browser, without a Craft proxy or any sanitization step.\n\n`HelpScreen` (Stack Exchange) is not affected because the Stack Exchange API HTML-encodes titles before returning them.\n\n## Steps to reproduce\n\n**Plant (attacker, GitHub account only):**\n\n1. Open `https://github.com/craftcms/cms/issues/new`.\n2. Set the title to a string combining a plausible search term and the payload, e.g.:\n\n```\n\u003cimg src=x onerror=alert(document.domain)\u003e cannot upload files\n```\n\n3. Submit the issue.\n\n**Trigger (victim, Craft admin):**\n\n1. Open the Craft control panel dashboard.\n2. Open the CraftSupport widget, click \"Give feedback\".\n3. Type `cannot upload files` in the search box.\n4. `alert(document.domain)` fires in the admin's session.\n\n## Impact\n\nXSS in the admin control panel session. The payload has access to `Craft.csrfTokenName` and `Craft.csrfTokenValue` and can send same-origin action requests as the admin without any further interaction.\n\n## Mitigating factors\n\n- Victim must actively use the \"Give feedback\" search screen.\n- Attacker must predict or social-engineer a search term the admin will type, or use a broad term likely to match.\n- Widget is only available to admins.\n\n## Resources\n\nhttps://github.com/craftcms/cms/commit/6bbb66038a268552180ca5c8eed9f46ea25a4417","status":"published","published":"2026-07-06T21:29:16Z","modified":"2026-07-06T21:29:17Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:40:39.314643Z"}],"nvd":[{"id":"CVE-2026-55790","description":"Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22 and 4.0.0-RC1 through 4.17.15, an attacker with only a GitHub account can plant a JavaScript payload in a craftcms/cms issue title. When a Craft admin uses the CraftSupport widget’s \"Give feedback\" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session. No control panel account or elevated privileges are required on the attacker’s side. This issue has been fixed in versions 4.17.16 and 5.9.23.","status":"published","published":"2026-07-01T23:16:52.483Z","modified":"2026-10-25T21:10:00.77Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:27.199837Z"}],"osv":[{"id":"CVE-2026-55790","title":"Craft CMS: DOM XSS via GitHub issue title in CraftSupport widget","description":"Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22 and 4.0.0-RC1 through 4.17.15, an attacker with only a GitHub account can plant a JavaScript payload in a craftcms/cms issue title. When a Craft admin uses the CraftSupport widget’s \"Give feedback\" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session. No control panel account or elevated privileges are required on the attacker’s side. This issue has been fixed in versions 4.17.16 and 5.9.23.","status":"published","published":"2026-07-01T22:57:53.934Z","modified":"2026-10-28T02:30:28.775199134Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:11.609219Z"},{"id":"GHSA-24x4-j6x9-rfw5","title":"Craft CMS: DOM XSS via GitHub issue title in CraftSupport widget","description":"## Summary\n\nAn attacker with only a GitHub account can plant a JavaScript payload in a `craftcms/cms` issue title. When a Craft admin uses the CraftSupport widget’s \"Give feedback\" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session.\n\nNo control panel account or elevated privileges are required on the attacker’s side.\n\n## Preconditions\n\n- Attacker has a GitHub account (no control panel access needed).\n- Victim is an administrator, and you have the CraftSupport widget on the dashboard.\n- Victim uses the \"Give feedback\" screen and types a search term that returns the poisoned issue.\n\n## Root cause\n\n`CraftSupportWidget.js` lines 382-392:\n\n```js\n$('\u003ca\u003e', {\n  href: this.getSearchResultUrl(results[i]),\n  target: '_blank',\n  html:\n    '\u003cspan class=\"status ' +\n    this.getSearchResultStatus(results[i]) +\n    '\"\u003e\u003c/span\u003e' +\n    this.getSearchResultText(results[i]),\n})\n```\n\n`FeedbackScreen.getSearchResultText` (line 669-671) returns `result.title` verbatim from the GitHub API response. The jQuery `html:` option sets the element’s `innerHTML`, so a title containing `\u003cimg src=x onerror=...\u003e` executes immediately on render.\n\nThe GitHub API returns issue titles as raw JSON strings with no HTML encoding. The widget makes this request directly from the browser, without a Craft proxy or any sanitization step.\n\n`HelpScreen` (Stack Exchange) is not affected because the Stack Exchange API HTML-encodes titles before returning them.\n\n## Steps to reproduce\n\n**Plant (attacker, GitHub account only):**\n\n1. Open `https://github.com/craftcms/cms/issues/new`.\n2. Set the title to a string combining a plausible search term and the payload, e.g.:\n\n```\n\u003cimg src=x onerror=alert(document.domain)\u003e cannot upload files\n```\n\n3. Submit the issue.\n\n**Trigger (victim, Craft admin):**\n\n1. Open the Craft control panel dashboard.\n2. Open the CraftSupport widget, click \"Give feedback\".\n3. Type `cannot upload files` in the search box.\n4. `alert(document.domain)` fires in the admin's session.\n\n## Impact\n\nXSS in the admin control panel session. The payload has access to `Craft.csrfTokenName` and `Craft.csrfTokenValue` and can send same-origin action requests as the admin without any further interaction.\n\n## Mitigating factors\n\n- Victim must actively use the \"Give feedback\" search screen.\n- Attacker must predict or social-engineer a search term the admin will type, or use a broad term likely to match.\n- Widget is only available to admins.\n\n## Resources\n\nhttps://github.com/craftcms/cms/commit/6bbb66038a268552180ca5c8eed9f46ea25a4417","status":"published","published":"2026-07-06T21:29:16Z","modified":"2026-09-10T03:51:09.883952357Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:33.956911Z"},{"id":"CLSA-2026-1784077481","title":"TuxCare security update for craftcms/cms (3 CVEs)","description":"TuxCare rebuilt craftcms/cms to address 3 CVEs. Fixed in 3.9.15-p6+tuxcare.","status":"published","published":"2026-08-04T14:52:43Z","modified":"2026-10-15T09:48:00.194386859Z","updated_at":"2026-11-02T15:43:46.151924Z"}]}}